Check this site, http://java-ebooks.blogspot.com/ .. This page contains 3 Ad units + 3 link units + 4 referral banners According to https://google.com/adsense/support/bin/answer.py?answer=15943&ctx=sibling , this is a clear violation And see the way he has displayed those ads
That's mean! I don't think you should report it unless you have evil intentions for that person, then by all means go for it.
Sometimes being "right" and reporting someone isn't always the "right" thing to do. I've always believed in, "What comes around, goes around". Maybe, most likely this website owner doesn't even know that he's violating the terms. I'm willing to bet - he/she doesn't. What if it were you? Wouldn't you rather have someone tell you first and give you the opportunity to fix it? I know I would! Afterall, you, we have more in common with this website owner than not. I, for one, am going to pay him a courtesy and do him a favor and try and let him know. Wouldn't you want someone to do that for you?